Source: % non-Hispanic Black data are from the 2019 American Community Survey 5-Year Estimates. Notes: Markers are weighted by the total number of tweets the state health department posted during the study period. The two states with the highest number/percentage of vaccine tweets that mention the key term are labeled. State health departments include the Twitter accounts of the District of Columbia health department and all US state health departments, except for the Wyoming state health department. Vaccine terms: vaccine, vaccination, Pfizer, Moderna, Johnson & Johnson, Janssen; Race terms: race, ethnicity, racial/ethnic categories specified by US Office of Management and Budget; Equity terms: (in)equity, (in)equality, (in)justice, disparity; Mistrust terms: trust, mistrust, distrust, hesitancy; Racism terms: racism, racist. Derivatives of terms are included.